Improvement in the process of burning lime by the introduction of a blast of air



UNITED STATES PATENT OFFICE.

SAM. GARBER AND H. swARTz NeRovER, or NORRISTOWN, PA.

IMPROVEMENT IN THE PROCESS OF BURNING LIME BY THE INTRODUCTION OF ABLAST OF AIR.

Specification forming part of Letters Patent No. 152 dated March 25,1837.

To all whom it may concern:

Be it known that we, SAMUEL GARBER and HENRY SWARTZENGROVER, ofNorristown, in the State of Pennsylvania, have invented an Improvementin the Process of Burning Lime; and we do hereby declare that thefollowingis a full and exact description thereof.

. -We take a kiln of either of the the ordinary constructions for theburning of lime, and we adapt thereto any of the various kinds ofblowing apparatus used for forges or for furnaces, and after havingcharged our kiln with limestone and fuel in the usual way and ignitedthe fuel, we introduce a blast of air into the same, giving to the blastsuch a degree of force as-may be found requisite. The blowing apparatuswhich we prefer is the ordinary fanwheel, as it affords at oncea morediffused blast than that from a bellows or from blowing-cylinders; butby the adoption of proper means well known to machinists, as by blowinginto a regulator, and by introducing the blast through several openingsas large as may be found convenient, it may be sufficiently diffusedfrom any blowing apparatus.

It is well known to those persons employed in the business of burninglime that the operation of a kiln is much influenced by the state of theweather, the fuel sometimes burning too feebly to produce a sufficientlyhigh temperature; but by means of the artificial blast the process ismade to go on independently of atmospheric changes, and the propertemperature rapidly attained. saving of fuel is large in amount, as theproper degree of heat can not only be produced, but also maintaineduntil the calcination is completed; and, furthermore, we are enabled toburn such fuel as would either be thrown away -or would be rejected asunsuited to the burn- By this procedure the

